Java 如何分别插入每个值

我需要你的帮助在列表中插入每个值

private List<String> selectedCertificate = new ArrayList<String>();

这将有助于：

 (String certificate: certificates) 
{   
preparedStatement.setInt(1, 50);
preparedStatement.setString(2, selectedCertificate);
}

---

也许那样的事情应该可以

String insertTableSQL = "INSERT INTO temp"
        + "(USER_ID, Certificate_Code) VALUES"
        + "(?,?)";

try {
    dbConnection = getDBConnection();
    preparedStatement = dbConnection.prepareStatement(insertTableSQL);

    for(String certif : selectedCertificate) {
        preparedStatement.setInt(1, 50);
        preparedStatement.setString(2, certif);
        preparedStatement.addBatch();
    }

    // execute insert SQL stetement
    preparedStatement.executeUpdate();

    dbConnection.commit();
    System.out.println("Record is inserted");

} catch (SQLException e) {

    System.out.println(e.getMessage());

}

---

那你有什么问题？你知道如何写循环吗？只要一个while循环，它就会解决这个问题。你可以使用while循环，但是for循环可能更容易使用。与字符串证书类似：证书{/*对证书*/}执行某些操作可能重复，或者此链接可能会有所帮助

 (String certificate: certificates) 
{   
preparedStatement.setInt(1, 50);
preparedStatement.setString(2, selectedCertificate);
}

String insertTableSQL = "INSERT INTO temp"
        + "(USER_ID, Certificate_Code) VALUES"
        + "(?,?)";

try {
    dbConnection = getDBConnection();
    preparedStatement = dbConnection.prepareStatement(insertTableSQL);

    for(String certif : selectedCertificate) {
        preparedStatement.setInt(1, 50);
        preparedStatement.setString(2, certif);
        preparedStatement.addBatch();
    }

    // execute insert SQL stetement
    preparedStatement.executeUpdate();

    dbConnection.commit();
    System.out.println("Record is inserted");

} catch (SQLException e) {

    System.out.println(e.getMessage());

}